wyattc20 wyattc20
  • 03-01-2020
  • Mathematics
contestada

Solve the system of equations using elimination. Make sure to show all work and find the value of both x and y
x-3y = 7
3x + 3y = 9
8x+ 3y = 1
4x + 2y = 0

Respuesta :

Yang100
Yang100 Yang100
  • 03-01-2020

Answer:

x=4, y=-1. (4, -1).

Step-by-step explanation:

x-3y=7

3x+3y=9

---------------

x=3y+7

3(3y+7)+3y=9

9y+21+3y=9

12y+21=9

12y=9-21

12y=-12

y=-12/12

y=-1

x-3(-1)=7

x+3=7

x=7-3

x=4

Answer Link

Otras preguntas

Did ladd think the actions of these voters were illegal? explain your answer
which event led to the other three
Fluorine has an atomic number of 9. The n = 1 energy level has two electrons, and the n = 2 energy level has seven electrons. Flourine's valence is _____
The process by which atoms are arranged to form a material with a crystal shape is called
Which of the following are the factors of 4b2 - 16? a. (2b + 4)(2b + 4) b. (2b – 2)(2b + 4) c. 4(b – 2)(b + 2) d. 2(b – 4)(b + 4)
Australia consists of _________ states and _________ federal territories. a. six; two b. four; five c. three; six d. two; nine
Please help me on this
How do you solve -5n-8(1+7n)=8
12 divided 2 times 2 ^ 3 equals 120
what is the difference between Nomads and hunter gatherers of ancient times